Cyclic heating compression molding die

Abstract

The utility model discloses a cyclic heating compression molding die, which comprises a die base, a base heating cavity, a pressing plate, a pressing plate and a pressing plate, a forming cavity axially penetrating through the mold cavity is formed in the mold cavity, and a mold cavity heating cavity is formed in the outer side of the forming cavity; the mold cavity is arranged on the mold base, so that the mold base can block the first end of the forming cavity; and the mold core can be inserted into the forming cavity from the second end of the forming cavity, and a mold core heating runner is arranged in the mold core. According to the utility model, a material to be molded in the molding cavity can be better heated, and the heating efficiency is improved; and meanwhile, the temperature difference of different positions in the forming cavity can be reduced, the forming requirements of high polymer materials, semiconductor packaging materials and the like on temperature-sensitive materials are met, and the problem that the materials are degraded or cured unevenly due to local overheating is solved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a circulating heating and pressing molding mold. Background Technology

[0002] Against the backdrop of sustained global economic growth and rapid technological iteration, the research and development of new materials has become a core driving force for the development of strategic industries such as aerospace, electronics and information, new energy, and biomedicine. The research and development progress of high-performance polymer materials, represented by battery separator materials for new energy vehicles, lightweight and high-strength composite materials for aerospace, and semiconductor chip packaging materials, directly impacts technological innovation and industrial upgrading within these sectors.

[0003] Precise and efficient sample preparation is a core step in verifying material performance during the research and development of new materials. This also highlights the importance of suitable molding die technology. Against this background, sample preparation, as a key step in verifying the performance of new materials, places unprecedentedly stringent requirements on the temperature control accuracy, pressure stability, and process flexibility of molding dies.

[0004] However, most existing molding dies use external heating elements such as electric heating rods and resistance wires, which have a slow heating rate (usually <1℃ / s) and poor temperature field uniformity (temperature difference at different locations in the cavity can reach 5-10℃). Utility Model Content

[0005] The purpose of this invention is to solve the above problems by providing a circulating heating pressing mold that uses circulating liquid heating, and the liquid temperature can be effectively controlled within ±0.5℃, providing a uniform temperature field for the mold.

[0006] The objective of this utility model is achieved through the following technical solution: a circulating heating pressing molding die, comprising:

[0007] The mold base has a heating chamber inside;

[0008] A mold cavity is provided inside which a forming cavity extends axially, and a mold cavity heating cavity is provided outside the forming cavity; the mold cavity is disposed on the mold base so that the mold base can block the first end of the forming cavity;

[0009] A mold core, which can be inserted into the molding cavity from the second end of the molding cavity, and a mold core heating channel is provided inside the mold core.

[0010] This invention features hot runners on the mold base, mold cavity, and mold core, which surround the molding cavity. This allows for better heating of the material to be molded within the cavity, improving heating efficiency. Simultaneously, the hot runners surrounding the molding cavity reduce temperature differences at different locations within the cavity, meeting the molding requirements of temperature-sensitive materials such as polymers and semiconductor packaging materials, and preventing material degradation or uneven curing due to localized overheating.

[0011] The mold core is also provided with a gas flow channel, and a gas guide port is provided at one end of the mold core that is inserted into the molding cavity. The gas flow channel is connected to the molding cavity through the gas guide port.

[0012] High-pressure gas can be introduced into the molding cavity through the gas flow channel and gas guide port, and non-contact demolding can be achieved under the action of gas pressure to avoid damage to the molded parts; at the same time, the introduced gas can form a gas film between the mold core and the cavity wall of the molding cavity, which facilitates the separation of the mold core from the mold cavity.

[0013] The mold cavity is equipped with a pad to limit the insertion depth of the mold core into the molding cavity. The limiting effect of the pad keeps the mold core in a fixed position, so as to maintain the material in the molding cavity under stable pressure and ensure molding quality. At the same time, the thickness and density of the molded part can be adjusted by adjusting the thickness of the pad.

[0014] The mold base is provided with a boss for sealing the first end of the molding cavity. The boss can better seal the molding cavity and prevent the material inside the molding cavity from leaking out. At the same time, the boss also plays a positioning role, so that the mold cavity and the mold base can be more accurately and quickly assembled.

[0015] The mold cavity is detachably mounted on the mold base via a connector to facilitate demolding of the molded part.

[0016] The inlet and outlet ends of the mold core heating channel, the inlet and outlet ends of the mold cavity heating chamber, and the inlet and outlet ends of the base heating chamber are all equipped with hot fluid joints.

[0017] Gas connectors are provided at both the inlet and outlet ends of the gas flow channel.

[0018] The mold core includes an end plate and a core body that are connected to each other; the core body is inserted into the molding cavity from the second end of the molding cavity, and the pad is disposed between the end plate and the mold cavity.

[0019] The mold cavity includes an inner cylinder, an outer cylinder sleeved on the outside of the inner cylinder, and two sealing plates respectively disposed at both ends of the inner cylinder and the outer cylinder; the inner cylinder, the outer cylinder and the two sealing plates together form the heating cavity of the mold cavity, and the internal cavity of the inner cylinder forms the molding cavity.

[0020] The pad comprises two detachably connected pad units. The detachable design facilitates installation and removal.

[0021] Compared with existing technologies, this application has the following beneficial effects: By arranging hot runners around the molding cavity and circulating hot fluid into them, this invention can better heat the material to be molded within the molding cavity, improving heating efficiency. Simultaneously, the hot runners surrounding the molding cavity reduce temperature differences at different locations within the cavity, meeting the molding requirements of temperature-sensitive materials such as polymers and semiconductor packaging materials, and avoiding problems such as material degradation or uneven curing caused by localized overheating.

[0022] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0023] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0024] Figure 1 This is a structural diagram of the present invention.

[0025] Figure 2 for Figure 1 Cross-sectional view at point AA.

[0026] Figure 3 for Figure 1 Cross-sectional view of section BB.

[0027] Figure 4 This is a structural diagram of the mold core of this utility model.

[0028] Figure 5 This is a structural diagram of the pad block of this utility model.

[0029] Figure 6 This is a structural diagram of the mold cavity of this utility model.

[0030] Figure 7 This is a cross-sectional view of the mold cavity of this utility model.

[0031] The reference numerals in the above figures are as follows: 10-mold core, 11-mold core heating channel, 12-gas guide port, 13-gas connector, 14-gas channel, 15-end plate, 16-core body, 20-pad block, 30-mold cavity, 31-mold cavity heating chamber, 32-forming cavity, 33-outer cylinder, 34-inner cylinder, 35-sealing plate, 40-mold base, 41-base heating chamber, 42-bore, 50-forming part, 60-connector, 70-hot fluid connector. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] It should be noted that if the terms "first," "second," etc., are used in the specification, claims, and accompanying drawings of this application, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] In this application, when terms such as "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" are used, they indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, in this application, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Example

[0039] like Figure 1 As shown, this embodiment discloses a circulating heating pressing molding die, including: a die base 40, a die cavity 30, and a die core 10. Wherein, as... Figure 2 As shown, a heating chamber 41 is provided inside the mold base 40. An inlet and an outlet end, communicating with the heating chamber 41, are provided on the side wall of the mold base 40. The inlet and outlet ends are located on opposite sides of the central axis of the mold base 40 and are staggered vertically. A hot fluid connector 70 is provided on both the inlet and outlet ends. Specifically, the hot fluid connector 70 can be a pagoda nozzle connector, which allows for quick connection to external heating equipment, such as a constant temperature oil bath. In use, the heating medium enters the heating chamber 41 from the hot fluid connector 70 at the inlet end. After heat exchange, the heating medium flows out of the heating chamber 41 from the hot fluid connector 70 at the outlet end, is heated by external equipment, and is then circulated back into the heating chamber 41.

[0040] like Figure 2 As shown, a molding cavity 32 is provided inside the mold cavity 30, and the molding cavity 32 axially penetrates the mold cavity 30; correspondingly, a mold cavity heating cavity 31 is provided outside the molding cavity 32. Specifically, as... Figure 6 , 7 As shown, the mold cavity 30 includes an inner cylinder 34, an outer cylinder 33 sleeved on the outside of the inner cylinder 34, and two sealing plates 35 respectively disposed at both ends of the inner cylinder 34 and the outer cylinder 33. The inner cylinder 34, the outer cylinder 33 and the two sealing plates 35 together form the mold cavity heating chamber 31, while the internal cavity of the inner cylinder 34 forms the molding cavity 32.

[0041] Similar to the mold base 40, the outer cylinder 33 also has an inlet end and an outlet end on its cylinder wall that communicate with the mold cavity heating chamber 31, and a hot fluid connector 70 is also provided on the inlet end and the outlet end. The arrangement of the inlet end and the outlet end on the mold cavity heating chamber 31 is the same as that on the base heating chamber 41, and will not be described again.

[0042] During installation, the mold cavity 30 is mounted on the mold base 40 so that the mold base 40 can seal the first end of the molding cavity 32. Specifically, as shown in the following configuration... Figure 2 As shown, a boss 42 is provided on the mold base 40. During installation, the lower end of the mold cavity 30 is mounted on the mold base 40, and the boss 42 is engaged with the lower end of the molding cavity 32. The boss 42 can better seal the molding cavity 32 and prevent material leakage from the molding cavity 32. At the same time, the boss 42 also plays a positioning role, enabling the mold cavity 30 and the mold base 40 to fit and assemble more accurately and quickly.

[0043] In addition, the mold cavity 30 can be detachably mounted on the mold base 40 via a connector 60. Specifically, the connector 60 can be a screw. After the mold cavity 30 is mounted on the mold base 40, the screw is used to lock the mold cavity 30 to the mold base 40. Setting the mold cavity 30 and the mold base 40 to be detachable facilitates the demolding of the molded part 50.

[0044] The mold core 10 can be inserted into the molding cavity 32 from the second end of the molding cavity 32, that is, the lower end of the mold core 10 can be inserted into the molding cavity 32 from the upper end of the molding cavity 32. For example... Figure 2 As shown, a heating channel 11 is provided inside the mold core 10. The heating channel 11 can be distributed in a zigzag manner along the axial direction of the mold core 10, so that the inlet and outlet ends of the heating channel 11 are both located at the upper end of the mold core 10. Similarly, both the inlet and outlet ends of the heating channel 11 are provided with hot fluid connectors 70 for connection to external heating equipment.

[0045] With the above structure, in use, the mold cavity 30 and the mold base 40 are first assembled, then the material to be molded is added into the molding cavity 32, and then the mold core 10 is inserted into the molding cavity 32. A liquid heating medium, such as water or heat transfer oil, is circulated into the heating cavity 41 of the base, the heating cavity 31 of the mold cavity, and the heating channel 11 of the mold core through an external heating device. The material in the molding cavity 32 is heated through heat exchange. At the same time, pressure is applied to the mold core 10, thereby pressing the material in the molding cavity 32 into shape. In this embodiment, by providing hot runners for the circulation of the heating medium on the mold base 40, the mold cavity 30, and the mold core 10, these hot runners surround the molding cavity 32, thereby better heating the material to be molded in the molding cavity 32 and improving heating efficiency. Meanwhile, the hot runner surrounds the molding cavity 32 and uses a circulating liquid heating method. The liquid temperature can be effectively controlled within ±0.5℃, providing a uniform temperature field for the mold, reducing the temperature difference between different locations within the molding cavity 32, meeting the molding requirements of temperature-sensitive materials such as polymer materials and semiconductor packaging materials, avoiding material degradation or uneven curing caused by local overheating, and also improving the temperature control accuracy of the mold.

[0046] As another implementation of this embodiment, such as Figure 2 As shown, a pad 20 is installed on the mold cavity 30 to limit the depth of the mold core 10 inserted into the molding cavity 32. For example... Figure 4 As shown, in a specific configuration, the mold core 10 includes an end plate 15 and a core 16 connected to each other. In this case, both the inlet and outlet ends of the mold core heating channel 11 can be located on the end plate 15. In the installed state, the core 16 is inserted into the molding cavity 32 from the upper end, while the spacer 20 is disposed between the end plate 15 and the mold cavity 30. Due to the abutment of the spacer 20 against the end plate 15, the depth of the mold core 10 inserted into the molding cavity 32 can be limited. Additionally, as... Figure 5 As shown, the pad 20 includes two detachably connected pad units, with a hole formed between the two pad units for the core 16 to pass through. The two pad units can be connected together by screws. In this embodiment, the pad 20 is made detachable, which facilitates the installation and removal of the pad 20. In addition, the pad 20 limits the depth of the mold core 10 inserted into the molding cavity 32. When pressure is applied to the mold core 10 during the molding process, the mold core 10 can be in a fixed position to maintain stable pressure on the material in the molding cavity 32 and ensure molding quality. In specific implementation, the depth of the mold core 10 inserted into the molding cavity 32 can be adjusted by replacing the adjusting pads 20 with different thicknesses, thereby adjusting the molding thickness and density of the molded part 50.

[0047] To facilitate demolding of the molded part 50, such as Figure 3As shown, in another implementation, a gas flow channel 14 is also provided inside the mold core 10, and a gas guide port 12 is provided at one end of the mold core 10 that is inserted into the molding cavity 32. The gas flow channel 14 is connected to the molding cavity 32 through the gas guide port 12. Specifically, the gas guide ports 12 can be evenly distributed around the circumference of the mold core 10. Similarly, the gas flow channel 14 can also be distributed in a zigzag manner along the axial direction of the mold core 10, so that the inlet and outlet ends of the gas flow channel 14 are also located on the end plate 15. Gas connectors 13 can be provided at both the inlet and outlet ends of the gas flow channel 14 to facilitate quick connection with an external gas supply device.

[0048] During demolding, the mold cavity 30 is first separated from the mold base 40. Then, high-pressure gas is introduced into the gas channel 14. The gas in the gas channel 14 is evenly sprayed out from the gas guide port 12 into the molding cavity 32. Under the action of air pressure, the molded part 50 is pushed out from the lower end of the molding cavity 32, achieving non-contact demolding and avoiding damage to the molded part 50. In addition, the introduced gas can form an air film between the mold core 10 and the cavity wall of the molding cavity 32, which facilitates the removal of the mold core 10 from the mold cavity 30.

[0049] The overall structure of the molding die in this embodiment is simple and compact, effectively reducing die design costs and production cycle. The die base 40, die cavity 30, die core 10, and pad 20 can all be made of high-quality aluminum alloy 5083. This material has excellent thermal conductivity, ensuring uniform heat transfer during the material molding process. Combined with the hot runners surrounding the molding cavity 32, a short-path heat transfer system of "heat source-die-material" is constructed. Furthermore, the circulating liquid heating medium (such as water or heat transfer oil) forms a closed loop through the hot runner inlet and outlet. Utilizing the high specific heat capacity of liquids (e.g., water up to 4.2 kJ / (kg·℃)) and strong temperature controllability, precise temperature control of ±0.5℃ is achieved; liquid circulation... The heating system has a heating rate of up to 5℃ / s (traditional electric heating wire heating <1℃ / s). Combined with the high thermal conductivity of the mold material, it only takes 40 seconds to heat from room temperature to 200℃ (existing technology requires more than 5 minutes), greatly improving heating efficiency. The mold base 40, mold cavity 30, and mold core 10 can be quickly assembled without the need for professional tools. Overall, the molding cycle of this embodiment is shortened from 10-30 minutes for traditional molds to 4-8 minutes, enabling high-frequency testing and meeting the "small batch, multiple iterations" requirements of new material research and development. This embodiment can be designed with miniaturization to facilitate small-sample preparation and reduce material loss during the research and development stage. The amount of material used per molding is reduced from several hundred grams to 5-20 grams. Combined with high-pressure gas demolding technology, sample breakage caused by manual demolding is avoided, reducing the material loss rate from 30% to below 5%, significantly reducing the material cost of new material research and development. In addition, by adjusting the thickness of the pad 20, it can support the preparation of small samples with a thickness of 0.5-5mm. During the research and development stage, there is no need to prepare special molds for different materials. The thickness and density parameters of the product can be adjusted simply by changing the pad 20 with different thicknesses.

[0050] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0051] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A circulating heating pressing mold, characterized in that, include: The mold base (40) has a base heating cavity (41) inside; A mold cavity (30) is provided inside which a forming cavity (32) extends through it axially, and a mold cavity heating cavity (31) is provided on the outside of the forming cavity (32); the mold cavity (30) is provided on the mold base (40) so that the mold base (40) can block the first end of the forming cavity (32); A mold core (10) is inserted into the molding cavity (32) from the second end of the molding cavity (32), and a mold core heating channel (11) is provided inside the mold core (10).

2. The circulating heating pressing mold according to claim 1, characterized in that, The mold core (10) is also provided with a gas flow channel (14), and a gas guide port (12) is provided at one end of the mold core (10) inserted into the molding cavity (32). The gas flow channel (14) is connected to the molding cavity (32) through the gas guide port (12).

3. The circulating heating pressing mold according to claim 1 or 2, characterized in that, A pad (20) is installed on the mold cavity (30) to limit the depth of the mold core (10) inserted into the molding cavity (32).

4. The circulating heating pressing mold according to claim 1, characterized in that, The mold base (40) is provided with a boss (42) for sealing the first end of the molding cavity (32).

5. The circulating heating pressing mold according to claim 1, characterized in that, The mold cavity (30) is detachably mounted on the mold base (40) via a connector (60).

6. The circulating heating pressing mold according to claim 1, characterized in that, The inlet and outlet ends of the core heating channel (11), the inlet and outlet ends of the cavity heating chamber (31), and the inlet and outlet ends of the base heating chamber (41) are all provided with hot fluid connectors (70).

7. The circulating heating pressing mold according to claim 2, characterized in that, Gas connectors (13) are provided at both the inlet and outlet ends of the gas flow channel (14).

8. The circulating heating pressing mold according to claim 3, characterized in that, The mold core (10) includes an end plate (15) and a core (16) connected to each other; the core (16) is inserted into the molding cavity (32) from the second end of the molding cavity (32), and the pad (20) is disposed between the end plate (15) and the mold cavity (30).

9. The circulating heating pressing mold according to claim 1, characterized in that, The mold cavity (30) includes an inner cylinder (34), an outer cylinder (33) sleeved on the outside of the inner cylinder (34), and two sealing plates (35) respectively disposed at both ends of the inner cylinder (34) and the outer cylinder (33); the inner cylinder (34), the outer cylinder (33) and the two sealing plates (35) together form the mold cavity heating cavity (31), and the internal cavity of the inner cylinder (34) forms the molding cavity (32).

10. The circulating heating pressing mold according to claim 3, characterized in that, The pad (20) comprises two detachably connected pad units.

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